The average speed of sound is 343 m/s. If a wavelength of a certain sound is 1.3 m, what is the frequency of that sound?

The average speed of sound is 343 m/s. If a pitch is heard at 500 Hz, what is the wavelength of that sound?

What is the wavelength of a wave if it moves at 100 m/s and has a frequency of 33 Hz?

Explanation:

(A) Speed of sound is 343 m/s

Wavelength of a sound wave is 1.3 m

Frequency,

(B) The average speed of sound is 343 m/s.

Pitch of the sound is 500 Hz

Wavelength,

(C) Speed of wave is 100 m/s

Frequency of wave is 33 Hz

Wavelength,

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.